A 13-year-old girl has been cleared of charges that she started a fire in a Vassalboro Community School bathroom last November that forced the evacuation of hundreds of students.The girl's lawyer tells the Morning Sentinel that a judge determined that the state failed to prove its case against her.The girl's father says information came out at the trial showing that two other girls were in the bathroom at the same time as his daughter, and they left after her.The fire that started on a plastic toilet paper dispenser forced the evacuation of about 500 students and caused smoke and water damage. No one was hurt.Prosecutors says the evidence was not conclusive enough to link the girl to the fire.